Well I feel late while logging this news. This news is already very old. Any way better late than never. Microsoft Windows Vista, Microsoft Office 2007 and Microsoft Exchange 2007 are launched to business on 30th November 2006. When I say available to business users, it is for organization those are having volume license for Microsoft products. If you are not a business user, no need to worry. You can still go and buy a new PC this christmas and all you need to do is, ask your vendor to provide facility to express upgrade to Microsoft Windows Vista, so that when tomorrow (30th Jan 2007) when Windows Vista comes out in retail you can upgrade your Vista Capabale or Vista Ready PC to Windows Vista without any pain. 

 http://www.microsoft.com/business/launch2007/default.mspx